hw/intc: Set GIC maintenance interrupt level to only 0 or 1

During sbsa acs level 3 testing, it is seen that the GIC maintenance
interrupts are not triggered and the related test cases fail.  This
is because we were incorrectly passing the value of the MISR register
(from maintenance_interrupt_state()) to qemu_set_irq() as the level
argument, whereas the device on the other end of this irq line
expects a 0/1 value.

Fix the logic to pass a 0/1 level indication, rather than a
0/not-0 value.

Fixes: c5fc89b36c0 ("hw/intc/arm_gicv3: Implement gicv3_cpuif_virt_update()")
Signed-off-by: Shashi Mallela <shashi.mallela@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20210915205809.59068-1-shashi.mallela@linaro.org
[PMM: tweaked commit message; collapsed nested if()s into one]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/hw/intc/arm_gicv3_cpuif.c b/hw/intc/arm_gicv3_cpuif.c
index 462a35f..3fe5de8 100644 (file)
--- a/hw/intc/arm_gicv3_cpuif.c
+++ b/hw/intc/arm_gicv3_cpuif.c
@@ -417,8 +417,9 @@ static void gicv3_cpuif_virt_update(GICv3CPUState *cs)
         }
     }
 
-    if (cs->ich_hcr_el2 & ICH_HCR_EL2_EN) {
-        maintlevel = maintenance_interrupt_state(cs);
+    if ((cs->ich_hcr_el2 & ICH_HCR_EL2_EN) &&
+        maintenance_interrupt_state(cs) != 0) {
+        maintlevel = 1;
     }
 
     trace_gicv3_cpuif_virt_set_irqs(gicv3_redist_affid(cs), fiqlevel,